yes
it depends where you get it
Call of duty 4 Call of duty world at war Halo 2
yes
Yes I do have Call of duty 4 for the Xbox 360.
Yes, ranking up only relates to xbox live and xbox live games, matches, and stats in Call Of Duty 4
PlayStation network does not have live that is Xbox term and PSN is free
Hosting comes at complete randomosity.
It all depends on your level.
Halo 3, Call of Duty 4, Call of Duty World at War, These are the most played games on XBL.
yes. but the only way that you can do that is in the private match mode on xbox live.
If you have an Xbox Live account (must be Gold) you can just go to multiplayer in the main menu then go to Xbox live and it will put you into a lobby from there.
well first of all online is xbox live and you cant beat it. :)